...a fingerprint.

The latest thing in computer security is the "fingerprint password". In today's "Kim Komando Electronic Newsletter", she writes: "Here’s how the fingerprint readers work. Touch the reader when prompted. Your fingerprint is read and stored as your user name and password. From that point on, you can log in to your computer by touching the reader. If the fingerprint matches, you’ll be logged in -- if it doesn’t, you won’t. Sure beats having passwords floating around." So I tried touching the image - and PRESTO - I was logged into Sam's bank account. 

Cool...